From 44583cba9188b29b20ceeefe8ae23ad19e26d9a4 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 13 May 2014 14:02:13 +0200 Subject: [PATCH] KVM: x86: use kvm_read_guest_page for emulator accesses Emulator accesses are always done a page at a time, either by the emulator itself (for fetches) or because we need to query the MMU for address translations. Speed up these accesses by using kvm_read_guest_page and, in the case of fetches, by inlining kvm_read_guest_virt_helper and dropping the loop around kvm_read_guest_page. This final tweak saves 30-100 more clock cycles (4-10%), bringing the count (as measured by kvm-unit-tests) down to 720-1100 clock cycles on a Sandy Bridge Xeon host, compared to 2300-3200 before the whole series and 925-1700 after the first two low-hanging fruit changes. Signed-off-by: Paolo Bonzini --- Reading git-format-patch failed